re PR tree-optimization/22035 (complex float comparison broken)

re PR tree-optimization/22035 (complex float comparison broken)

        PR tree-opt/22035
        * builtins.c (fold_builtin_complex_mul): Remove.
        (fold_builtin_complex_div): Remove.
        (fold_builtin_1): Don't call them.
        * fold-const.c (fold_complex_add, fold_complex_mult_parts,
        fold_complex_mult, fold_complex_div_parts, fold_complex_div): Remove.
        (fold_binary): Don't call them.  Don't expand complex comparisons to
        elementary comparisons.
        * tree-complex.c (init_dont_simulate_again): Enhance search for
        stmts that require decomposition.
        (complex_visit_stmt): Handle RETURN_EXPR properly.
        (create_components): Handle no referenced variables properly.
        * tree.h (fold_complex_mult_parts): Remove.
        (fold_complex_div_parts): Remove.

From-SVN: r101086